package com.zhm.springcloud.controller;

import com.zhm.springcloud.entities.CommonResult;
import com.zhm.springcloud.entities.Payment;
import com.zhm.springcloud.lb.LocalBalcncer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * Date： 2021/3/7 22:09
 *
 * @author ZHM
 */
@RestController
@Slf4j
public class OrderController {

    /**
     * 单机版本这是写死的
     */
    // private static final String PAYMENT_URL = "http://localhost:8001";
    /**
     * 部署在集群上就不指定 IP+端口号 ，可以写成注册在Eureka注册中心的服务的服务名称
     */
    private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    /**
     * 自定义的负载均衡
     */
    @Resource
    private LocalBalcncer localBalcncer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<CommonResult> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<CommonResult> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/lb")
    public String paymentLb() {

        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (null == instances && instances.isEmpty()) {
            return null;
        } else {
            ServiceInstance serviceInstance = localBalcncer.instances(instances);
            URI uri = serviceInstance.getUri();
            return restTemplate.getForObject(uri + "/payment/lb", String.class);
        }

    }

    // ==================> zipkin+slepth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin() {
        String result = restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin/", String.class);
        return result;
    }


}
